• Environmental noise assessements
  • Building Acoustic
  • Room acoustics - STIPA
  • Noise monitoring
  • Product noise testen
  • Vibration measurements
  • Noise in the workplace
  • Infrasound
  • Ultrasound


  • Easy connectivity via built in WLAN and 3G/4G LTE modem.
  • Large colour touchscreen
  • Intuitive user interface and custom-made user setups.
  • Easy to use.




  • Precision sound level meter and frequency analyser according to class 1.
  • Easy connectivity via built in WLAN and 3G/4G. LTE modem (Nor145).
  • Large colour touchscreen (4.3”).
  • Real push keys for quick operation in challenging environments.
  • Intuitive user interface with graphical icons for selection of measurement mode and custom-made user setups.
  • Voice, text notes and built-in GPS for documentation of the measurements.
  • Wide frequency range (0,4 Hz – 40 kHz in 1/3 octave band and FFT).
  • Parallel 1/3 octaves and FFT analysis.
  • 120 dB measurement range.


  • ISO 717-1, ISO 717-2, ISO 10140-2, ISO 10140-3, ISO 10140-4, ISO 16283-1, ISO 16283-2, ISO 16283-3, ISO 354, ISO 3382-2, ISO 10052, ISO 1996-1, ISO 1996-2
  • IEC 61260-1, IEC 61260-2, IEC 61260-3, IEC 61672-1, IEC 61672-2, IEC 61672-3
  • EN 61010-1
  • ASTM E1007-21, ASTM C423-23, ASTM E336-23, ASTM E413-22, ASTM E90-9
  • ANSI S1.4, ANSI S1.11
  • DIN 45657, DIN 4109-4, TA-Lärm
  • NS 4814, NS 4815, NS 8172
  • BS EN ISO 16283-1, BS EN ISO 16283-2, BS EN ISO 16283-3
  • SS 25267
  • SIA 181



Selecting the different application is easy using the Application menu appearing after power on.
You may also create own favorite setups indicated as smaller icons in the startup picture.






The Nor145 Analyser is designed to be expanded and upgradeable to give you a complete measurement tool for years to come. Norsonic’s retrofit policy ensures regular software updates with new features and new options followed by a 3 years warranty.

Nor145 basic unit:
includes A, C and Z weighting networks with measurement of Leq, LeqI, LE – sound exposure level, SPL, Lmax, Lmin with parallel detection of Fast, Slow and Impulse time constants, statistical calculation of Ln, and TMAX5. The measurement data is analysed as global values in addition to two parallel time profiles with an adjustable resolution ranging from 5 ms to 24 h. Voice and text annotation included.

Option packages:

Nor145 Advanced Level option kit (e.g. for ENV) containing option: 3, 4, 11, 12.

Nor145 Building Acoustic option kit incl. option 3, 7, 8, 9.

Nor145 Consultant package option kit containing option 3, 4, 7, 8, 11, 12, 13.

Option 1: GPS and support for external IP camera


The GPS is used for position identification, and support for exact time synchronisation. Time synchronisation is especially useful when several instruments are used for capturing the same noise event, such as blast monitoring.

With an external IP camera, you can make event triggered pictures. Pictures captured during a measurement is marked as events in the L/t graph and can be view on the Nor145, in NorCloud or in NorReview.

The GPS position is stored as a part of the measurement file. It may also be set to be a part of the file name.

This option is not available as retrofit and must therefore be ordered along with the instrument.

Option 3: 1/1 and 1/3 octave band filters


1/1 and 1/3 octave filters (0,4 – 20 kHz in 1/3 octave band) including multi-spectre functionality in time profile A.

A 3-order analogue high pass filter with a -3 dB point at 3 Hz may be selected to avoid overloading the input circuitry from low frequency noise.

Option 4: Audio recording and markers


This option adds audio recording and marker management to the Nor145. On a Nor145 it is possible to playback and listen to the audio recording via headphones.

Option 4 also adds a sophisticated but easy to use marker management, indispensable for every environmental noise assessment task. The user can select up to ten markers, add names, colour and associate the marker to an action. The marker can either be a single or a toggle marker. The action can be; enable a reference tone, start a recording, take a picture or set one of the digital outputs found on the 15pin socket. It is easy to add markers on an ongoing measurement. Voice and text notes may in the same way as markers be added to an ongoing measurement. The markers can be moved or deleted. Markers may also be added as post processing on the instrument.

The Nor145 offers six system markers that are automatically inserted in the Level versus time profile. These are; Measurement Pause marker, Measurement continue marker, Audio recording marker, Picture marker (from IP camera), Signal overload marker, Battery low marker, Event trigger marker.

The Nor145 is seamless integrated to the PC program NorReview to further evaluate and calculate the noise data and to create customised reports.


  • 12 or 48 Khz audio recording sampling rate
  • 8, 16 or 24 bit audio recording resolution
  • 0 to 60 dB digital audio recording gain
  • 0 to 120 sec audio recording pre-trigger
  • Innovative marker management system

Option 7: Signal generator


Signal generator with sine, white, pink, band passed filtered noise.

Option 8: Reverberation time decay and calculation of T20 and T30


Reverberation Time decay and calculation of T20 and T30 based on impulse or noise excitation.

Requires option 3. And option 7 if RT shall be based on noise excitation.

Option 9: Complete Building Acoustic mode


Complete Building Acoustic mode with microphone position room averaging in accordance with ISO 16283 as well as sound insulation indices calculated in accordance with ISO 717/1 and /2.

Requires option 3, 7, 8.

Option 11: Enhanced noise assessment package


Enhanced noise assessment package including internal web server for remote control via smartphones, pads and PC and additional four triggers for independent setting of different trigger levels during a day.

Requires option 4.

Option 12: NorCloud


With this option you are able to connect the instrument to Norsonic’s cloud service; NorCloud.

NorCloud is a Norsonic system to collect, display and process sound level data.

When used together with Nor145 sound analyser, you can measure, analyse and report directly from your web browser. Create projects, assign sound level meters to projects and configure settings such as audio recording, SMS/e-mail alarms and automatic reporting.

Norsonic stores your data safely and conveniently, but you are of course free to download your measurements.

Option 13: FFT


FFT sampling rate is 48 kHz with more than 16000 lines. Upper frequency is 22 kHz. Dynamic zoom from 1 – 64. The FFT calculation and 1/3 octave spectrum works in parallel.

Split view with FFT and 1/3 octave. The link cursor feature connects the cursor in FFT and 1/3 octave displays, making it easy to manoeuvre in the frequency domain

Option 14: Ultrasound


Ultrasound option including 1/3 octave filters to 40 KHz, 1/1 octave to 31.5 KHz and AU network.

Requires option 5.

Option 16: Build in WLAN and LTE modem (Edge – 4 G)


This option is not available as retrofit and must therefore be ordered along with the instrument.



The Nor145 sound level meter is supplied with ½” preamplifier Nor1209 and the ½” measurement microphone Nor1239.

It conforms to the latest revision of the following National and International standard including amendments, all type 1 / class 1; IEC 61672, IEC 61260, DIN 45657, ANSI S1.4, ANSIS1.11, and ANSI S1.43. It also conforms to the obsolete sound level meter standards IEC 60651 and IEC 60804.

Measured Parameters

Simultaneous measurement of SPL, Leq, LeqI, LMax, LMin, LE, LEI, LPeak, Ln and Tmax5.
Time weighting functions: Fast, Slow and Impulse (Simultaneous).
Spectral weighting functions: A, C and Z – weighting (Simultaneous).
Frequency analysis: 1/1 and 1/3 octave real time filters from 0,4 Hz to 20 kHz.
Statistical calculations: 8 individual adjustable percentiles from L0,1% to L99,9%, The statistical calculations are performed in real time within each frequency band and for each profile period if period length is set longer than 2 minutes. Class width is 0,2 dB. Dynamic range is 130dB.

Measurement control

Overall measurement duration: 1 sec – 7 days. (If set to Repeat or Synchro mode a new measurement will be started automatically, with no time gap between each measurement).
Time profile A resolution: 5 ms – 24 hours including full frequency spectra. From 1 sec if profile B or Moving is enabled.
Time profile B and Moving resolution: 1 s – 24 hours. A, C and Z – no frequency spectra.
Back erase in Pause mode: 0-20 sec free delectable graphical back erase.

Audio recording

12 and 48 kHz sampling rate / 8 , 16 and 24 bits / 0-120 sec pre-trigger.

Measurement range

One range covering 120dB without any range adjustments.
Self noise measured with 1/2” microphone with a nominal sensitivity of 50mv/Pa: 17 dBA.
Maximum RMS level 137 dBA, Maximum Peak level 140 dB PeakC.

Noise Generator

Built in noise generator with Sine, White, Pink and 1/1 and 1/3 octave band passed filtered noise.

Reverberation Time

Parallel calculation of T15, T20 and T30 in addition to Tmax for Noise excitation and EDT for impulse excitation.


Sampling rate: 48 kHz.
Frequency resolution: 1.46 Hz or 2.92 Hz (FFT size 8192 or 16384 lines).
Upper frequency: 22 kHz
Functions: Auto spectrum, linear averaging.
Acquisition rate: ~700 ms – no overlap.
Display: Dynamic display zoom 1 – to 64 in power-of-two steps.
Time windowing: Hanning


4,3″ colour display capacitive touch. Protected by an anti-smudge coated and scratch-proof glass.


Built in GPS
Support for external IP camera. With an external IP camera, you can make event triggered pictures. Pictures captured during a measurement is marked as events in the L/t graph and can be viewed on the Nor145, in NorCloud or  NorReview.

Datastorage / Datatransfer

Storage modes: Manual, Auto, Repeat and Synchro. Synchro synchronise the start of the next measurement to the next full hour.
Internal memory: 350 MB – not used for measurement storage.
Micro SD card: Supports XC and HC standard. No limitation in max. SD card size.
Data transfer via LAN and USB.
Optionally built in GPRS – 3G/UMTS – 4G/LTE and Wifi infrastructure and hotspot.
Internal antenna supports 3G/4G. External antennas with diversity may be connected. External antenna supports also GPRS connection.


Microphone input: One microphone input. Supports standard 7 pin Lemo preamplifiers including SysCheck, Microphone heating, TEDS and IEPE.
Polarization voltage: 0
Preamplifier voltage:  ± 15V.
Comment microphone: Via 3,5 pin mini jack.

Analogue outputs

AC out, 100mV full scale on 15 pin I/O socket.
3 pin mini jack headphone socket for replay of voice notes, listen to microphone AC signal or replay of audio recordings. Comment microphone for voice notes is connected to same plug.
Signal generator on 15 pin I/O socket with Pink, White, Bandpass filtered, sine and impulse noise.


Rechargeable 7 Ah Li-Ion batteries with built in fuel gauge.
External power: 9 – 15Vdc 3-5Watt.
Typical battery lifetime: 8 hours.

Dimensons & weight

Dimensions: 235 x 82 x 29 mm (ex. preamplifier and microphone LxWxH)
Weight : 535 g (including preamplifier and microphone)





STIPA IEC 60268-16 ed. 5

  • STIPA - IEC 60268-16 ed. 5 standard -


    EC 60268-16 (Ed.5.0 2020): Sound system equipment – Part 16: Objective rating of speech intelligibility by speech transmission index.
    The CIS-value is calculated from the STI-value as specified in: IEC 60849 (Ed. 2.0 1998-02) Sound systems for emergency purposes. (Withdrawn 2008).
    The instrument measures STIPA as specified in Annex B of IEC286-16 by the direct method.


Do you have any questions
or need support?

Call Icon Mail Icon